The concern that one CT examination is not enough to cause cancer is overstated. Because CT is a common test and the amount of radiation is within the normal range, CT is mainly used to diagnose diseases, and if one CT examination is enough to cause cancer, the state will definitely prohibit CT examinations, so patients do not need to worry too much about the amount of CT radiation. In addition, the amount of radiation in CT is getting lower and lower, and the examining doctor will choose the low-dose scanning method to carry out the examination.